CHINESE JOURNAL OF ENERGETIC MATERIALS
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Integrated Additive Manufacturing Technology of Composite Solid Propellant and Resistive Temperature Sensor
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1.Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China;2.College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;3.Inner Mongolia Power Machinery Research Institute, Hohhot 010010, China;4.Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 210096, China

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    Abstract:

    Compared with traditional casting method, composite solid propellant manufactured by additive manufacturing (commonly known as “3D printing”) technology exhibits a series of technical advantages, such as arbitrary grain configuration without mold limitation and continuously controllable formulation as well as performance. In order to improve printing effect, printing formulation and technical parameters of composite solid propellant based on light-curing molding were studied, and the performance of printed propellant samples was evaluated. In addition, comprehensive additive manufacturing of composite solid propellant and resistive temperature sensor was achieved by integrating resistive temperature sensor into the printed propellant samples, and the resistance values of temperature sensor at different temperatures were examined. The results show that solid propellant slurry with 83% solid content displays a good pre-curing effect by adding no less than 3% ultraviolet (UV)-curable resin. The slurry with 77% or 80% solid content can be extruded through a 0.26 mm diameter needle, while solid content reaching 81% or above requires a 0.5 mm diameter needle. The printed propellant sample comprising 81% solid content possesses good dimensional stability and unconspicuous appearance defects, but computed tomography (CT) results reveal the existence of lamellar pores inside the sample. The tensile strength and elongation at break of printed propellant sample are equal to 0.94 MPa and 15.63% at 20 ℃, respectively. At 60 ℃, the tensile strength and elongation at break of sample are 0.70 MPa and 14.63%, respectively. The printed propellant owns comparable tensile strength and reduced elongation at break compared to conventional casting propellant. The bonding strength between temperature sensor and propellant is 0.21 MPa, showing favourable bonding effect. The resistance of temperature sensor varies linearly with temperature within testing temperature range (20-60 ℃), demonstrating good temperature monitoring capability.

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周明月,王立民,梁导伦,等.复合固体推进剂与电阻式温度传感器一体化增材制造技术[J].含能材料,2022,30(9):927-936.
ZHOU Ming-yue, WANG Li-min, LIANG Dao-lun, et al. Integrated Additive Manufacturing Technology of Composite Solid Propellant and Resistive Temperature Sensor[J]. Chinese Journal of Energetic Materials,2022,30(9):927-936.

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History
  • Received:September 17,2021
  • Revised:July 15,2022
  • Adopted:May 20,2022
  • Online: July 08,2022
  • Published: September 25,2022